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Solar Physics

, Volume 157, Issue 1–2, pp 271–283 | Cite as

Semi-empirical models of the white-light flare on October 24, 1991

  • C. Fang
  • J. C. Hénoux
  • Hu Ju
  • Xue Yin-Zhang
  • Gao Xiu-fa
  • Fu Qi-Jun
Article

Abstract

On October 24, 1991, a white-light flare was observed both from space and from the ground. A multi-waveband spectral analysis shows that the peak time of the continuum emission coincides well with that of a radio burst at 2840 MHz and with the hard X-ray emission. Three semi-empirical models, corresponding to the pre-flare condition and to the peak time of continuum emission both with and without non-thermal excitation and ionization of hydrogen by an electron beam, have been obtained. The results indicate that there is fast heating both in the chromosphere and the photosphere. Some evidence is given that this WLF is very likely a result of bombardment by an electron beam. By taking into account non-thermal effects, the chromospheric temperature of the semi-empirical model is significantly reduced.

Keywords

Hydrogen Flare Electron Beam Spectral Analysis Peak Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • C. Fang
    • 1
    • 2
  • J. C. Hénoux
    • 2
  • Hu Ju
    • 1
  • Xue Yin-Zhang
    • 1
  • Gao Xiu-fa
    • 1
  • Fu Qi-Jun
    • 3
  1. 1.Department of AstronomyNanjing UniversityChina
  2. 2.Observatoire de Paris, DASOP-URA326 (CNRS)Meudon CedexFrance
  3. 3.Beijing Astronomical ObservatoryAcademia SinicaBeijingChina

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